How to assign different scenes for workspaces in Blender 2.8?
Just to clarify (or what I think the problem is):  It's annoying to constantly change the active scene when switching between Video editing and any other operation.

The workaround is to use "Window->New Main Window" and use the first window for 'Video Editing' and the second window for everything else. I realize the convenience when you change the scene for Layout/Modeling/Sculpting/Animation etc. But this becomes an INconvenience for the 'Video Editing' workspace. It seems it takes another monitor to go smoothly.